Nitrogen, with the chemical formula N₂, is usually a colorless and odorless gas, accounting for about 78% of the volume of air (about 21% of oxygen). Only about 0.02 volume of nitrogen is dissolved in 1 volume of water. High-purity gases play an important role in modern industry. High-purity nitrogen (N2) is one of the most widely used high-purity gases. It is mainly used in semiconductor, metallurgy, chemical, heat treatment, chemical fiber, food and other industries. At present, the purity of high-purity N2 produced in my country is generally below 99.999%. The lack of qualitative and quantitative detection methods for measuring components in high-purity gases is a bottleneck that restricts the further improvement of the purity of high-purity gases in my country. The impurity components in high-purity nitrogen mainly include oxygen, water, carbon dioxide, etc. In industries such as semiconductor and chemical industries, the content of oxygen and water in high-purity gas has a great impact on process quality.

Nitrogen purity has N2, N3, N4, N5, N7 and other standards. N5 is our common high-purity nitrogen of 99.999%, a high purity of five nines. 0-1000ppm/0-100ppm is an extremely demanding oxygen content monitoring standard, which has extremely high accuracy for the overall oxygen detector. What is the concept of this measurement range? ppm is a proportional unit of one part per million. All this is an extremely small concentration. This trace oxygen measurement range is also used in many tests in the field of high-purity nitrogen. In order to verify the purity of nitrogen, the oxygen content in nitrogen is measured to determine whether the nitrogen purity reaches 99.999%, which is the popular five nines. High purity nitrogen application fields.
When the oxygen content in nitrogen exceeds the process specifications, it will directly threaten production safety. Therefore, it is necessary to accurately monitor the oxygen content in nitrogen. For detecting the trace oxygen content in nitrogen, the Industrial and Mining Network recommends the Austrian SENSORE trace oxygen sensor/PPM grade oxygen sensor- SO-D0-020-A300C.

Austria SENSORE trace oxygen sensor/PPM level oxygen sensor - SO-D0-020-A300C is a limiting current type oxygen sensor. The carrier of current in the zirconia electrolyte is oxygen ions, so when the voltage is applied to the zirconia electrolyte, oxygen passes through The zirconia disk is pumped to the anode. If a cap with a hole is added to the cathode of an electrolyzer, the rate of oxygen flow to the cathode is restricted. Being limited by this rate, the electrolyzer gradually increases as the applied voltage increases. Because the carriers of current in a zirconia electrolyte are oxygen ions, when voltage is applied to the zirconia electrolyte, oxygen is pumped through the zirconia disk to the anode. . If a cap with a hole is added to the cathode of an electrolyzer, the rate of oxygen flow to the cathode is restricted. Limited by this rate, the current in the electrolyzer reaches saturation as the applied voltage gradually increases. This saturation current is called the limit current, which is proportional to the oxygen concentration in the surrounding environment. SO-D0-020-A300 has a measuring range of 0.01%-2%, a line length of 3 meters, and can detect oxygen at a minimum of 100pm. Trace oxygen SO-D0-020-A300 is widely used in metal laser sintering 3D printers, nitrogen production, fermentation and other fields.